Extract Multi Values to Points
Summary
Extract raster cell values at the specified location in the point feature class and record them to the property table of the point feature class. The tool will update the attribute table of the input point feature, extract the cell values from all the input raster where each point position is located, and the new field containing the value of each input raster cell will be appended to the input point feature class, and the field will be added to the attribute table of the point feature with the name of each image file, and the field value will be the extracted raster cell value.
The location where the value is extracted from the NoData cell of the input raster will be given a value in the output table<空>. For shapefiles, since empty fields are not supported, the NoData cells are represented in the table with a value of -9999.
The shapefile format limits the maximum length of field names to 10 characters. Therefore, for any field appended to the shapefile property table, its name will be truncated and a unique value will be obtained. If the names are long or similar, it can make it difficult to distinguish between fields.
The tool cannot use multipoint elements. To perform an analysis using a multi-point feature, convert it to a single feature.
When a multiband raster is specified as one of the input raster values, all bands in that input are used. When entering a multi-band grid, the name of the output field added for all bands will contain b1, b2, ... bn prefix.
Usage
ClickData Management> Vector Tools > Extract Multi Values to Points
Settings
- Select File:：Select a file containing point features. Shp and gpkg formats are supported. For gpkg format, cell values will be obtained for each point feature layer.
- Select File List：Add the raster images from which you want to extract cell values. Common formats such as tif, tiff, dat, and img are supported.
- Bilinear Interpolation of Values at Point Locations：Specify whether to use bilinear interpolation to obtain cell values at point locations. If set to No, no interpolation method is applied and the cell center value is used; if set to Yes, bilinear interpolation will be used to calculate the cell value based on the valid values of neighboring cells. NoData values will be ignored during interpolation.
Attention：
1.If the input image file names are the same, only the first image file name and its corresponding raster cell value will be listed in the attribute table fields.2.If there are fields with the same name, it will report error messages.